DFMUA

Question 1

What temperature is a DFMUA for typically

Answer 1

-5 to 75 F

Question 2

What happens to the flame when it has too much air velocity

Answer 2

Flame is lean and lifting

Question 3

What happens to the flame when it has low air velocity

Answer 3

Flame becomes low and luminous with poor mixing

Question 4

What is use to adjust the air velcoity

Answer 4

Profile plates

Question 5

What is low duct velocity

Answer 5

3”

Question 6

What is medium duct velocity

Answer 6

3-6”

Question 7

What is high duct velocity

Answer 7

6-10” DO not want higher than 7

Question 8

What do you use size duct

Answer 8

ductulator

Question 9

When using a linkage a far way what type of pipe must be used

Answer 9

Black Iron

Question 10

ACME screws are

Answer 10

Lead screws
Trapezoidal thread
6” travel

Question 11

What is the max length of the silicone tube for the differential pressure transducer

Answer 11

6 feet

Question 12

What kind of fan wheel is used for draft

Answer 12

centrifugal

Question 13

What is balanced draft

Answer 13

When it has forced and induced draft